Carr, AlanAlanCarr2015-01-222015-01-222007-06http://hdl.handle.net/10197/6322One in four people suffer from mental health problems, so mental health problems are a major national and international challenge. Psychotherapy is an effective intervention for a wide range of mental health problems in people of all ages. The average success rate for treated cases ranges from 65 to 72%.enPsychotherapyMethodologiesHistoryLiterature reviewThe Effectiveness of Psychotherapy. A Review of Research prepared for the Irish Council for PsychotherapyTechnical Report2014-11-06https://creativecommons.org/licenses/by-nc-nd/3.0/ie/